Flue-cutter.



G. R. MAUPIN.

FLUE CUTTER.

APPLICATION FILED JAN. 2o, 191s.

Patented Jan. 13, 1914.

4 SHEETS-SHEET 1.

G. R. MAUPIN.

PLUB CUTTER.

APPLICATION HLED JAN.20,1913.

Patented Jan. 13, 1914 4 SHEETS-SHEET 2,

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BLUE GUTTER APPLICATION FILED JAN. 20, 1913.

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1,084,097. Patented Jan. 13, 1914.

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PLUIE-CUTTER.

Specification of Letters Patent.

. ppcation filed January 2G, 1913.

Paten ted Jari 313, MNM, Serial No. 743,198.

To all whom it may concern.'

lie it known that l, Gniwns R. h/LiUrIN, a citizen of the United States, and resident of Moberly, Randolph county, Missouri, have invented certain new and useful Iniproveinents in Fluo-Cutters, of which the following is a specification containing a full, clear, and exactdescription, reference be* ing had to the accompanying d awings, forming a part hereof.

My invention relates to improvements in iue cutters, and the object of niy invention is to construct a cutter having` a. plurality of cutting ineinbers arranged to automatically feed as the cutters are 1noved.

With the above purposes in view niy in` vention consists in certain novel features of construction and arrangement of parts as will be hereinafter' more fully described, pointed out in. the claims and illustrated by the acctnnpanying drawings, in which- Figure 1 shows in elevation a flue cutter constructed according to niy invention in position to operate; Fig. Q is in end elevation. of the flue cutter showing the rotating and feeding ratchets; Fig. 3 is a longitudinal sectional elevation of the cutterI in position in a tine; Fig. si is an enlarged de tail sectional elevation illustrating the nesting of the cutter carrying arms showing in dotted lines the positions of the cutter arms before the operation of cutting. Fig. is an end elevation of the head of the cutter; Fig. 6 is an end elevation of the cutter with the head-plate removed` the cutters being in positions after they have completed a cnt, and F ig. 7 is a transverse sectional elevation taken on the line 7 7 of Referring by numerals to the accompanying drawings: S designates the sleeve or tubular body portion having at its one end the enlarged integral head 9 in which is formed the radial channels 10. The sleeve has atits other end the reduced and threaded exten sion 11 and the bearing 12.

t3 designates the headplate which is secured to the head 9 by ineans of the screws let.

l designates the guide which is; secured to av stein 1G carried by the head-plate 13.

17 designates the cutter blocks. fn the form of cutter shown there are three of such blocks, each of which is arranged for radial movements in the channels l() and all of which are retained in the channels by ineans of the head-plate 13. Each of the blocks 17 is bifurcated at its inner end forming the perforated ears 18, and at their outer ends each of the blocks l? is bifurcated in a direction at right angles to the axis of the cutter to forni the ears 19. Each of the ears 19 is perforated to receive the pins Q0 upon which are rotatably supported the disks 2l.

designates an internally threaded cylindrical body arranged for axial inovement within the sleeve 8, the body 22 carrying at. its one end pairs of perforated ears 23, each pair of which alines with one of the channels fornied in the head 9.

24: designates arnis which are secured to the blocks 18 by ineens of the pins 25, and also secured to the perforated ears 23 by means of pins 2G.

27 designates a feed shaft having an integral journal 28 which rides in the bearing l2 carried by the sleeve S. Next adjacent to the journal QS there is an annular flange Q9 which prevents inoveinent of the feed shaft 2T in one direction. rllhe shaft 27 from the said flange 2S) to its inner end is externally threaded for engagement in the internally threaded body 2i?. Outside of the journal Q8 the shaft is provided with a stub 80 which is provided with an external left hand thread, and integral with the stub there is a non-circular extension 8L 32 designates a ratchet wheel which is threaded to the extension l1 of the sleeve.

33 designates a ratchet wheel which is threaded to the stub of the feed shaft.

Bet designates a pawl carrier provided with the rings 35 which embrace the sleeve in such manner that the pawl-carrier may be rotated relatively to the sleeve. Formed in the body of the pawl-carrier 34 there is a bore 3G, and located in said bore is a dog 37.

38 designates a handle which is detachably secured to the pawl-carrier 34, and 39 designates an eXtensile coil spring located in the bore 3G and iinpinging the dog 37 at one end and the handle 38 at the other end.

40 designates a pair of bifurcated stubs arranged to support a leaf spring ll1 which bears against a detent Ll2 pivotally secured to the pawl carrier.

The dog 3i' arranged to engage with the ratchet wheel 32 for the rotation of the entire cutter, and the detent 4t2 is arranged to engage with the ratchet wheel for the feed of the disks.

lft. is to be particularly noted that the ratchet wheels are oppositely arranged in order that, when the operating lever is oscillated in one direction, the cutting operation is performed, and that in the return movement of the handle the disks are moved outwardly in a feeding direction.

43 designates a collar which is arranged for movementupon the sleeve 8, and carried thereby is a pair of set screws 44, in order to fix the collar against axial movement relative to the sleeve. Carried by the collar is a flanged stop 45 which is mounted in such manner as to be capable of rotary movement relative to the collar, but fixed against lengthwise movement relative to the collar. As clearly shown in Figs. l and 3, this stop and collar provide a means for determining the extent of insertion of the cutter into the flue, and by means of the set screws 44 the degree of insertion may be varied at will.

The leaf spring 4l and the detent 42 are arranged in such manner that the spring will serve to either hold the detent in engagement with the ratchet wheel 33, or will hold the detentin a position not engaging with the ratchet wheel. By this means the feed may be accomplished on each oscillation of the cutter, or the cutters way be operated without the automatic feed.

I claim:

l. In a Hue cutter, a tubular body portion, a radially channeled head carried by the body portion, blocks arranged for movement in the channels of said head, disks carried by said blocks, a sliding body Within said tubular body portion, arms pivotally connecting said sliding body and said blocks, means for rotating said tubular body, a

ratchet connection between said means and said body whereby, when said means is rotated in one direction, the body will be rotated, a second ratchet connection with said means, and a threaded connect-ion between said second ratchet and the sliding body whereby the feed of said disks is accomplished when said means is rotated in a direction opposed to a cutting direction.

2. In a flue cutter, a head having a plurality of radial channels, blocks arranged for movement in said channels, disks carried by said blocks, a body arranged for axial movement relative to the head, arms pivotally connecting said body and said blocks, a ratchet mechanism for rot-ating said head in one direction to cause said disks to cut, and a second ratchet mechanism for moving said body axially relative to the head for the feed of said disks.

3. In a flue cutter, a tubular body having an enlarged head provided with radial channels, blocks arranged for movement in said channels, cutters carried by said blocks, an element arranged for axial movement in said tubular body, arms pivotally connecting each of said blocks with said axially movable element, and means for moving said element.

In testimony whereof, I have signed my name to this specification, in presence of two subscribing witnesses.

GRAVES R. MAUPIN.

.Vitnesses GEO. BESTEN, J r., IDA DULANY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

